SU1317134A1 - Method of hydraulic winning of minerals through wells from production levels - Google Patents

Abstract

The invention relates to the field of mining and geology. The goal is to reduce the costs of hydroproduction and to improve the conditions for hydropultering of the pulp due to the use of quality wells (cj of exhausted chambers). The productive horizon C expands and one of them is placed downhole jetting unit. The layers are eroded from top to bottom to form a digging chamber and pulp discharging. At the soil of the productive horizon, the ground is left with the rear sight. Then the production casing (EC) is lowered into the waste chamber and a hardening tab is fed. Before starting the erosion of the adjacent excavation chamber, the previously formed pillar was eroded by performing a connection that connects C and EC. At the assembly level, the EC is perforated and the next chamber is started to develop. A circular diffusion of rocks is produced. in C in the coupling and through perforations in the EC When sealing C, the pulp can be dispensed by overpressure in the coupling and in the chamber 2 Il. i (L J / tfvff | o 4 ;:

Description

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The invention relates to mining and geology and can be used in downhole hydraulic mining of minerals, as well as in drilling and testing of productive horizons.

The aim of the invention is to reduce the costs of hydroproduction and improve the conditions for hydropultering of the pulp by using waste chambers as well.

FIG. 1 and 2 are diagrams explaining the sequence of operations for the proposed method.

The method is illustrated by the example of geotechnological mining of a powerful productive horizon, represented by valuable weakly resistant ores with unstable overburden rocks. The productive horizon is opened by the wells 1. and 2. In the well 1, a downhole jetting unit is placed and, in layers from top to bottom, the rocks of the productive horizon are eroded to form a extraction chamber and pulp is discharged on. surface. When the horizon spreads near the soil from the side of the old excavation chamber, the rear sight 3 is left. Then, in the well 1, up to the soil of the productive horizon, the production column 4 is placed with the tightly closed end. After this, a hardening tab 5 is fed to the first extraction chamber.

After a set of strenuous strength in: well 2, a well monitor 6 is placed, with which the coupling 7 is carried out, while the rocks of the rear pillar 3 are softened. The well 2 and the production string 4 are connected with a breakdown.

Following this, with the help of well-known downhole hydraulic perforators, production perforation 4 is perforated at the level and at the opposite of the coupling. Then, they start working out the second chamber, producing a circular crust of rocks with a diffuse rock bypassing through well 2 into connection 7 and further four.

cutting the perforation into the production string 4. When sealing the well 2, the pulp can be dispensed by creating an overpressure

in the second chamber and assembly 7. Dp of pulp delivery along the production string 4 can be used airlift.

When the perforation holes are grouted, the downhole hydromonitor is lowered from the second chamber into the coupling and the holes are cleaned with a jet.

When working out the second chamber, you can also leave the rear of the soil of the productive horizon from the third chamber and repeat all the above operations when working out the third chamber.

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Claims (1)

Formula Isob.teni The method of well, aezhidnoy hydroproduction of minerals from productive horizons, including drilling wells to the bottom of the productive horizon, placing borehole hydromonitors in them, washing out the horizon rocks with the formation of adjacent excavation chambers, spreading pulp to the surface and feeding into the bookmark chambers, to reduce the costs of hydroproduction and improvement of the hydroplaning conditions of the pulp due to the use of used chambers as dispensing wells, when the rocks in the excavation chamber near the soil are productive, the sectoral pillar is formed on the side of the adjacent chamber, after which the operational column is lowered into the exhaust chamber and a hardening bookmark is supplied, before starting the erosion of the adjacent extraction chamber, the coupling between adjacent wells is performed by diluting the previously formed rear sight, 45 perforate the production string at the level of the coupling and reprocess the chamber by passing the pulp through the coupling and perforation into the production string.